<template>
  <div class="person">
    <h1>情况三：监视【reactive】定义的【对象类型】数据</h1>
    <h2>姓名：{{ person.name }}</h2>
    <h2>年龄：{{ person.age }}</h2>
    <button @click="changeName">修改名字</button>
    <button @click="changeAge">修改年龄</button>
    <button @click="changePerson">修改整个人</button>
    <hr>
    <h2>测试：{{ obj.a.b.c }}</h2>
    <button @click="test">修改obj.a.b.c</button>
  </div>
</template>

<script lang="ts" setup name="Person">
import { reactive, watch } from 'vue'
// 数据
let person = reactive({
  name: '张三',
  age: 18
})
let obj = reactive({
  a: {
    b: {
      c: 666
    }
  }
})
// 方法
function changeName() {
  person.name += '~'
}
function changeAge() {
  person.age += 1
}
function changePerson() {
  // person = { name: '李四', age: 80 }//直接修改，不行
  // person = reactive({ name: '李四', age: 80 })//包裹修改，也不行
  Object.assign(person, { name: '李四', age: 80 })
}
function test() {
  obj.a.b.c = 888
}

// 监视-情况三：监视【reactive】定义的【对象类型】数据，且默认是开启深度监视的
watch(person, (newValue, oldValue) => {
  console.log('person变化了', newValue, oldValue)
})
watch(obj, (newValue, oldValue) => {
  console.log('Obj变化了', newValue, oldValue)
})

</script>

<style scoped>
.person {
  background-color: skyblue;
  box-shadow: 0 0 10px;
  border-radius: 10px;
  padding: 20px;
}

button {
  margin: 0 5px;
}

li {
  font-size: 20px;
}
</style>